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Commit | Line | Data |
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5ead97c8 JF |
1 | /* Xen-specific pieces of head.S, intended to be included in the right |
2 | place in head.S */ | |
3 | ||
4 | #ifdef CONFIG_XEN | |
5 | ||
6 | #include <linux/elfnote.h> | |
08b6d290 | 7 | #include <linux/init.h> |
7077c33d | 8 | |
5ead97c8 | 9 | #include <asm/boot.h> |
7077c33d | 10 | #include <asm/asm.h> |
0341c14d | 11 | #include <asm/page_types.h> |
abbe1cac | 12 | #include <asm/unwind_hints.h> |
7077c33d | 13 | |
5ead97c8 | 14 | #include <xen/interface/elfnote.h> |
4e903a20 | 15 | #include <xen/interface/features.h> |
526abeae JG |
16 | #include <xen/interface/xen.h> |
17 | #include <xen/interface/xen-mca.h> | |
7e0edc1b | 18 | #include <asm/xen/interface.h> |
5ead97c8 | 19 | |
c504b2f1 | 20 | #ifdef CONFIG_XEN_PV |
08b6d290 | 21 | __INIT |
5ead97c8 | 22 | ENTRY(startup_xen) |
abbe1cac | 23 | UNWIND_HINT_EMPTY |
5ead97c8 | 24 | cld |
04b6b4a5 BO |
25 | |
26 | /* Clear .bss */ | |
27 | xor %eax,%eax | |
28 | mov $__bss_start, %_ASM_DI | |
29 | mov $__bss_stop, %_ASM_CX | |
30 | sub %_ASM_DI, %_ASM_CX | |
31 | shr $__ASM_SEL(2, 3), %_ASM_CX | |
32 | rep __ASM_SIZE(stos) | |
33 | ||
4478c407 BO |
34 | mov %_ASM_SI, xen_start_info |
35 | mov $init_thread_union+THREAD_SIZE, %_ASM_SP | |
36 | ||
5ead97c8 | 37 | jmp xen_start_kernel |
2582d3df | 38 | END(startup_xen) |
08b6d290 | 39 | __FINIT |
c504b2f1 | 40 | #endif |
5ead97c8 | 41 | |
a987b16c | 42 | .pushsection .text |
7d0642b9 | 43 | .balign PAGE_SIZE |
5ead97c8 | 44 | ENTRY(hypercall_page) |
abbe1cac JP |
45 | .rept (PAGE_SIZE / 32) |
46 | UNWIND_HINT_EMPTY | |
47 | .skip 32 | |
48 | .endr | |
526abeae JG |
49 | |
50 | #define HYPERCALL(n) \ | |
51 | .equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \ | |
52 | .type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32 | |
53 | #include <asm/xen-hypercalls.h> | |
54 | #undef HYPERCALL | |
2582d3df | 55 | END(hypercall_page) |
5ead97c8 JF |
56 | .popsection |
57 | ||
58 | ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux") | |
59 | ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6") | |
60 | ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0") | |
8c5e5ac3 | 61 | #ifdef CONFIG_X86_32 |
7077c33d | 62 | ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET) |
8c5e5ac3 JF |
63 | #else |
64 | ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map) | |
8f5b0c63 | 65 | /* Map the p2m table to a 512GB-aligned user address. */ |
daaa42f0 | 66 | ELFNOTE(Xen, XEN_ELFNOTE_INIT_P2M, .quad (PUD_SIZE * PTRS_PER_PUD)) |
8c5e5ac3 | 67 | #endif |
c504b2f1 | 68 | #ifdef CONFIG_XEN_PV |
7077c33d | 69 | ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen) |
c504b2f1 | 70 | #endif |
7077c33d | 71 | ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page) |
063334f3 BO |
72 | ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, |
73 | .ascii "!writable_page_tables|pae_pgdir_above_4gb") | |
74 | ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES, | |
75 | .long (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0)) | |
5ead97c8 | 76 | ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes") |
5ead97c8 | 77 | ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic") |
7e0edc1b JF |
78 | ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, |
79 | .quad _PAGE_PRESENT; .quad _PAGE_PRESENT) | |
80 | ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1) | |
d1e9abd6 | 81 | ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN, .long 1) |
7077c33d | 82 | ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START) |
8c5e5ac3 | 83 | ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0) |
5ead97c8 JF |
84 | |
85 | #endif /*CONFIG_XEN */ |